温度和含湿量对建筑材料导热系数的影响

发布时间：2019-07-16 20:59

【摘要】：导热系数是建筑材料最重要的热湿物性参数之一,温度和含湿量均能够对其产生影响。当温度和含湿量中的一个因素被确定后,一元线性函数通常被用来描述另一个因素对导热系数的影响。然而,实际情况下二者对导热系数的影响是同时存在的。采用防护热板法对聚苯乙烯泡沫(EPS)、岩棉、混凝土、胶粘剂和抹面胶等5种典型建筑材料在不同温度和含湿量下的导热系数进行测试。结果表明,对上述材料而言,二元线性函数可以用来描述温度和含湿量对导热系数的影响,且温度和含湿量之间的交互作用可以被忽略。对于EPS和岩棉等弱吸湿弱毛细材料而言,可以将二元线性函数简化为仅与温度相关的一元线性函数。
[Abstract]:Thermal conductivity is one of the most important thermal and wet physical parameters of building materials, and temperature and moisture content can affect it. When one factor in temperature and moisture content is determined, the univariate linear function is usually used to describe the effect of another factor on the thermal conductivity. However, in practice, the influence of the two on the thermal conductivity exists at the same time. The thermal conductivity of five typical building materials, polystyrene foam (EPS), rock cotton, concrete, adhesive and veneer adhesive, at different temperature and moisture content, was tested by protective hot plate method. The results show that for the above materials, the binary linear function can be used to describe the effect of temperature and moisture content on the thermal conductivity, and the interaction between temperature and moisture content can be ignored. For weak moisture absorption and weak capillary materials such as EPS and rock cotton, the binary linear function can be simplified to a univariate linear function only related to temperature.
【作者单位】：西安建筑科技大学建筑学院;中国建筑科学研究院建筑环境与节能研究院;华南理工大学亚热带建筑科学国家重点实验室;
【基金】：国家自然科学基金(51508542) 华南理工大学亚热带建筑科学国家重点实验室开放课题(2016ZB19)~~
【分类号】：TU50

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